Platen printing-press.



PATENTED NOV. 1, v190 -A. JOISTEN.

PLATEN PRINTING PRESS.

APPLICATION FILED SEPT. 17, 1902.

5 SHEETS-SHEET 1 N0 MODEL.

PATENTED Nov. 1, 1904.

A. JOISTEN. PLATEN PRINTINGPRESS.

. APPLICATION FILED SEPT.17. 1902.

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,NO MODEL.

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No. 773,748. PATENTED NOV. 1, 1904.

I A. JOISTEN.

PLATEN PRINTING PRESS.

APPLICATION FILED SEPT. 17, 1902.

5 SHBETSSHEET 3.

NO MODEL.

witnesses No. 773,748. PATENTED NOV. 1, 1904.

' A. JOISTEN. PLATEN PRINTING PRESS.

APPLIOATION FILED SEPT. 17, 1902.

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No. 773,748. PATENTED NOV. 1, 1904.

- A. JOISTEN. I

PLATEN PRINTING PRESS.

' APPLICATION nun SEPT. 17. 1902.

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PATENT EEicE.

ALBERT J OISTEN, OF DUSSELDORF, GERMANY.

PLATEN PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 773,748, dated November1, 1904. I Application filed September 1'7, 1902. Serial No. 123,783.(No model.)

To aZZ whom it may concern:

Be it known that I, ALBERT J OISTEN, a subject of the King of Prussia,German Emperor, residing at Dusseldorfbn-the-Rhine, in the Province ofthe Rhine, Kingdom of Prussia, German Empire, have invented anew anduseful Improvement in Platen Printing-Presses, of which the following isa specification.

This invention relates to a platen printingpress in which the platen andthe bed have a vertical position, the latter being adapted to move toand fro in such a way that its vertical position is evermaintained.

In the accompanying drawings, Figure l is a side elevation of the press.Fig. 2 is a rear view. Fig. 3 is a front view. Fig. 4: is a top view ofthe press. Fig. 5 is, on larger scale, an elevation of the chief part ofthe device for carrying the paper. Fig. 6 shows the mechanism forrotating the inking device.

Fig. 7 shows the mechanism for guiding the bed when moved to and fro andwhen tilted for preparing the form. Fig. 8 is a view of the holder forthe inking-rollers. Fig. 9 is a diagram for illustrating the differentmotions of the bed, of the inking device, and of the paper-carrier. Fig.10 is, on a larger scale, a vertical section according to line E F ofFig. 4, distinctly showing the essential parts of the gripper-actuatingmechanism. the paper feeding and delivery device, and the inkingmechanism. Figs. 11, 12, and 13 show they construction of the grippers.Fig. 14: is a section on line A B of Fig. 10. Fig. 15 is a section online C D of same figure.

The invention will be more readily understood by first describing thediagram of Fig;

9. In this figure, a is the platen, which does not move during theperiod of printing. ois the form-bed of nearly cylindrical shape, whichduring the printing period moves to and fro in a horizontal direction insuch a way that the form attached to the vertical flat surface of thebed ispressed against the likewise vertical flat side of the platen a atthe end of its forward stroke. By this means the printing operationrequires a very simple and short movement only, so that the quickness ofprinting and the efficacy of the machine are increased. The inkingdevice is arranged in such a manner that the inkingrollers roll alongthe nearly cylindrical surface of the bed 6, thus using the saidsurface, in a certain sense, as a distributing-disk. Then theinking-rollers strike along the flat surface of the bed 6 2'. 6., alongthat part to which the printing-form is attached-in order to leave thecolor on this form.. In Fig. 9 the way of the inking-rollers is markedby the dotted line (Z, and the direction of this walk is indicated byarrows accompanying line (Z. The described manner of conducting theinking-rollers around the form-bed isalready known; but new is themanner of rotating the whole inking device by means of a chain providedwith tension-rollers, as later will be seen. For carrying the paper tothe printing-spot grippers are provided, which move around the platen a,as indicated in Fig. 9 by dotted line f and accompanying arrows. Thesingle sheets which are to be printed are guided to the grippers at hand they aredelivered at 9. Means are provided for always securing theproper positions of the sheets, especially for inducing them verticallyto hang in the grippers when the latter are in front of the flat side ofplaten (a, By hand the bed 6 can be turned round axis 0, and the platena can be turnedround axis 2' in such a way that the fiat surfaces assumehorizontal positions for preparing the printing-form and the platen,respectively. It must, however, be

pointed out that during the printing period the fiat parts of the bedand of the platen, respectively, have always a vertical position.

After having thus described the diagram of Fig. 9 reference is had tothe other figures.

lie the main driving-shaft, which is provided with a fly-wheel 7t. Uponthe shaft Z a toothed wheel 16 is secured, which engages with anothertoothed wheel, on. The latter-engages with a toothed wheel 12;, securedto the axle To the ends of the said axle cranks 0 0 are rigidlyattached, which are connected with the ends of the axle c by means ofthe rods 19 19, respectively. On each side of the bed 6 the axle c isprovided with a roller 9, carrying, by means of the piece 9'', twosmaller rollers s and t. This construction is distinctly illustrated byFig. 7. During the printing period the axle 0 moves to and fro withinthe slots 17, provided in the side parts of the main frame. Each slot 17is surrounded by a recess 2), having straight prolongations a 18 andcurved prolongations w The said recess 6. in connection with thestraight prolongationsu and 18, serves for guiding the rollers g, .9,and t, thus preventing the bed Z) from tilting during its horizontalmovement. If the bed 7) is to be turned by hand for preparing the form,the rollers s and t are induced to enter the curved prolongations w andof recess 7:, so that they strike against the ends of such prolongationsand keep the tilted bed in its position.

The journals of the inking-rollers 24 are after a well-known fashionsupported in small frames y, Figs. 8, 10, and 15, which by means ofsprings 25, Fig. 8, keep the inking-rollers in contact with the surfaceof the bed I) even when the rollers move along the fiat part of the bed.

All parts which are not of importance in this invention are left out inthe drawings in order to better show the essential parts. The said smallframes 7 are hinged to levers .2, which are fastened to chain-wheels 1,Figs. 6, 10, and 15, adapted loosely to move on the axle 0 of bed .71.By means of the chains 2 the said chain-wheels 1 are connected withchain-wheels 3, which are secured to the shaft 19 of the toothed wheelat. The latter is, as mentioned above, operated from the main shaft Z bymeans of the toothed wheel 16. Tension-rollers 4: serve for maintainingthe gearing of the chains 2 with the chain-wheels 1 and 3 when thedistance between the said chain-wheels diminishes in suit of the bed I),moving toward the platen a.

For feeding and delivering the paper to be printed four grippers 5 ofsome well-known construction are provided; but I prefer -to constructthe grippers as illustrated in Fig. 11, where the parts of which eachgripper is composed are distinctly shown. The mode of employment of suchgrippers can be seen from Figs. 12 and 13, though the said figures donot relate to one of the grippers 5, but to a gripper 1a, mentioned morebelow. In order to induce the grippers s to walk, as shown in Fig. 9 bythe dotted line f on each side of the platen a, the axle d is providedwith a star 6, having four arrows, to the outer ends of which thegrippers are hinged by means of short levers 10, Figs. 5, 10, and let.The grippers are supplied with guiding-pieces 7, adapted to move with acertain play in a slot 8, provided in the side parts of the main frameof the machine. This slot 8 hasnearly the shape of a square with roundcorners. It will be seen that on operating the stars 6 the grippers 5revolve around the platen a in the and curved extensions on the top andbottom,

l l l required sense and that they have a vertical position when theimpression is made, While at it and g the grippers have appropriatepositions for taking and delivering the sheets, respectively.

The means for opening the grippers, as well as the means for conductingthe sheets from the on-laying place to it and from g to the taking-offplace, are of no importance for this invention. It may, however, be saidthat oscillating levers 11 and 13, with grippers 12 and 14:,respectively, are designed to perform the said operations and that thestock of the sheets to be printed rests on a table 15.

The mechanism for oscillating the levers 11 and 12 and for actuating thegrippers 12 and 14 is shown in Fig. 10 and will be understood by itself.The square ends 22, Fig. 11, of the grip per-hinges are guided in slots26 and 27, respectively, and the grippers will open as soon as one ofthe noses 2O strikes against the corresponding projection 21, fixed tothe main frame of the machine. Each gripper is provided with a spring 23for shutting the gripper when the noses 20 are removed from theprojections 21. The grippers 5 are actuated in a similar Way.

What 1 claim as my invention, and desire to secure by Letters Patent ofthe United States of America, is-

1. In a platen i rintingpress the combination of a platen a withvertical face, a formbed I) having a vertical part for carrying theform, means for horizontally moving the bed Z) to and fro, an axle 0adapted loosely to turn within the bed Z), levers a secured to the axle0, an inking device hinged to the levers z, chain-wheels 1 rigidlyattached to the levers 2, chain-wheels 3 secured to an axle 19, chains 2connecting the wheels 1 and 2, respectively, tension-rollers i operatingagainst the chains 2, the frame of the machine, and means for feedingthe paper as well as for taking it ofl, as and for the purpose setforth.

2. in a platen printing-press the combination of a platen at, having avertical face, an axle 71 adapted loosely to move within the platen (0,stars 6 secured to the axle 2:, grippers 5, guiding-pieces 7 levers 10for hinging the guiding-pieces 7 to the arms of the stars 6,respectively, guiding-slots 8 provided in the frame of the machine andhaving nearly the shape of a square, the frame of the machine, means forconducting the paper to the grip pers 5, means for taking the paper fromthe grippers 5, a form-bed 7), means for producing the printingpressure, and means for inking, as and for the purpose set forth.

3. In a platen printing-press, the combination of a frame having slotsin its sides, said slots being surrounded by a recess, said recesshaving straight prolongations at each end an axle mounted in the slots,a bed loose on In testimony WhereofIhave signed my name the axle,rollers carried by the axle, said rollto this specification in thepresence of tWo sub- IO ers lbeing adapted to ride in the recess, andits scribing Witnesses.

pro ongations, means for moving the bed to and fro, a platen having itsface vertically dis- ALBERT JOISTEN' posed during the printingoperation, means Witnesses:

for inking and feeding means operated in con- CARL SGHMITT,

junction With the platen. GENTER GINNHOLZ.

